How flu vaccines are made, the Autumn Statement, and first aid in schools

Why is the minimum wage for people under 21 lower than the rate for everyone else? The National Union of Students believes it's age discrimination, but employers' organisations say it helps to reduce youth unemployment. Getting together with others to bulk-buy gas and electricity could help to reduce fuel bills, but why are people so reluctant to switch suppliers? Is it time for First Aid training to be made compulsory in schools, as a part of the National Curriculum?